Table IV.

Cox regression analysis for screening the clinical factor independently correlated with prognosis in the training set.

	Uni-variables cox
Clinical characteristics	HR	95% CI	P-value
Age (years)	1.012	0.999–1.024	6.38×10−2
Neoplasm histologic grade (G1/G2/G3/G4/-)	1.338	0.927–1.932	1.19×10−1
Pathological stage (II/III/IV/-)	1.005	0.753–1.342	9.73×10−1
Neoplasm cancer status (tumor free/with tumor/-)	0.279	0.129–0.601	5.30×10−4a
Lymphatic invasion (yes/no/-)	1.078	0.678–1.714	7.52×10−1
Venous invasion (yes/no/-)	0.619	0.365–1.049	7.21×10−2

HR, hazard ratio; CI, confidence interval

^aindicates significant P-value.